The most common use of aluminum foiled duct is that in the heating and air conditioning industry. Flexible and rigid duct is often used to route conditioned air with a home or building. Aluminum foiled duct is used because of its high strength to weight ratio—a very lightweight section of rigid duct can be spanned large distances without needing to be supported. Its flexible form is used because of aluminum's ability to stretch; a flexible aluminum foiled duct can be bent hundreds of times and still maintain an air tight cavity. Insulated forms of both of these can be used to minimize transfer of heat between the contents and the environment, making HVAC systems more efficient.
Another very common use of aluminum foiled duct is as a dryer duct. Clothes dryers use high heat to dry clothes, converting the water in the clothes to water vapor that is then vented out of the home. Aluminum foiled duct is commonly used in this application because of its resistance to corrosion. A duct can transport moist air for many years without the threat of rust.The cost of these aluminum foiled ducts is generally low due to the small diameter of duct needed.
Since aluminum foiled duct can either be rigid or flexible, installation is typically quite simple. Rigid units can be supported by metal or plastic strapping attached to the structure itself, or they can be directly mounted to a surface using large brackets. Flexible sections of duct can be allowed to rest on an uneven surface, or hung using metal or plastic strapping. Since aluminum foiled ductwork maintains an airtight cavity, it doesn't need to be supported in a way that maintains a straight line of delivery.
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